Question

1. which structure develops from an embryonic notochord?

○ vertebrae
○ gills
○ muscles
○ scales

Explanation:

In chordates, the embryonic notochord is replaced by the vertebral column (vertebrae) during development. Gills are respiratory structures, muscles are for movement, and scales are dermal structures, none of which develop from the notochord.

Answer:

A. vertebrae